1、MIL-E-28932A(MC) 13 January 1972 SUPERSEDING MIL-E-28932 (MC) 25 August 1969 MILITARY SPECIFICAT ION ELECTRONIC SHOP, TRANSPORTABLE: EXPANDABLE, TEST INSTRUMENT FACILITY 1.- SCOPE 1.1 This specification covers one type of expandable transportable test instrumen,t facility electronic shop with repair
2、 and environmental equipment compactly installed. 2. APPLICABLE DOCUMENTS *2.1 date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. The following documents of the issue in effect on SPECIFICAT IONS FEDERAL L-P-387 SS-G- 6 5 9 TT-E-485
3、TT-E-529 ZZ -T-4 16 DDD-T -8 6 PPP-F- 3 20 PPP-P - 29 1 Plastic Sheet, Laminated, Thermosetting (for Designation Plates). Graphite, Dry (Lubricating) . Enamel, Semi-Gloss, Rust-Inhibiting . Enamel, Alkyd, Semigloss. Tire Rebuilding And Tire And Tube Repair Materials. Tape, Textile, Cotton, General P
4、urpose, (Unbleached, Bleached or Dyed) . Fiberboard, Corrugated And Solid, Sheet Stock (Container Grade) And Cut Shapes. . Paperboard, Wrapping, Cushioning. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-2893ZA Y7 W 997990b 0247833 O MILITARY
5、MIL-P-116 - MIL-T-152 L MIL-T-704 MIL-P-15024 MIL-E-16400 MIL-1-1 65 6 2 MIL-Cu26861 MIL-S-28931 MIE-C-45662 Preservation, Methods Of , Treatment, Moisture-and Fungus-Resistant, Of Communications, Electronic, And Associated Electrical Equipment. Treatment And Painting Of Materiel. Plate, Tags And Ba
6、nds For Identification Of Equipment. Electronic Equipment, Naval Ship And Shore: General Specification. Insulation, Synthetic, Rubber-Like, Cliemical Expanded, Cellular (Sheet Form) , Cushioning Material, Resilient Type, General , Shelters, General Purpose: Expandable, Transportable , Calibration Cy
7、stem Requirements. Colors, Marking For Shipmerit And Storage. Quality Of Wood Meribers Per Containers Environmental Test Methods , Arad Pallets. Wo Se MARINE CORPS 8702893 - Electronics Shop Calibration Group. DE PZ101 - Wickes Industries (Mfr. Code 74451) Drawings Data List, Air Conditioner, PAC-2-
8、SlO. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-E-2893ZA Li7 W 790b 02117833 Li = conforming to MIL-E46400 shall be given first con- siderati
9、on, If the contractor can demonstrate that the use of prefixred parts or materials will not fulill the design objectives because pf size, weight, mfomance or other reasons, parts or materials shall be used which most nearly meet or exceed the performange requirements of the applicable specifications
10、, provided the requirements of size, weight, performance, or. reLiability will not be impaired as a result of such substitutions, In all cases, the meeting of general material requirements such as nonflammability, fungus resistance, and nontoxicity and the meeting of environmental conditions of MIL-
11、E-16400 shall be of prime Consideration. for plug-in construction, the requirements of 3.2 shall apply if the assembly isto be built for piece part maintenance, If the assembly is to be expanded, the assembly shall be constructed so that the item as a whole will pass material, electrical and environ
12、mental tests without consideration to the quality of detail parts. assembly built to be expanded shall require approval by the contracting officer. 3.2.1 Pluq-in part selection. In the selection of parts Arry 3.2.2 Tropicalization. Tropicalization of the equipment shall be effected by the selection
13、of fungus inert parts and materials, impractical, the parts and materials shall be treated in accordance with MIL-T-152 prior to installation so that overall spraying is not necessary. This does not apply to the equipment listed in It applies only to certain equipment listed in Tables V and V, and t
14、o the shelter and its accouterments. Where the foregoing is Tables I, .II and III. 3.3 Desiqn and construction. The electronic shop test instrument facility shall consist of two expandable shelters conforming to type I of MzLIS-2893i, -each of which shall be capable of independent transport and oper
15、ation as well as deployment with another identical shelter as an expandable complex. The. two shelters shall be equipped with work benches, racks, I 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-electrical ducts, fluorescent and incandescent ligh
16、ting, power receptacles, power control panel, heater, air conditioner, solar heat protection, etc., as specified herein and as considered necessary by the contractor as being essential to meet the requirements of this speci- fication. operation in the single shelter configuration (SSC) and the expan
17、ded shelter configuration (ESC), SSC equipment m shall consisteof electronic equipment, equipment racks, storage racks, storage drawers, small parts cabinets, work benches, portable work benches and ancillary equipment as specified herein. Theelectronic shop shall be capable of 3 . 3,l Desian obi ec
18、tives . The objectives in design of the electronic shop shall be accessibility of equipment, ease of operation, operating conditions, crew comfort, adequate work area, and transport by aircraft, helicopter or truck, 3.3.2 Interior equipment desiqn and fabrication, The contractors design and fabricat
19、ion of the equipment facilities (mechanical and electrical) installed within the shelter shall be as specified herein, The contractor shall prepare equipment layouts for the two shelters which shall be designated shelter No. 1 and shelter No. 2. These layouts shall be submitted to the contracting of
20、ficer 90 days prior to first article testing, Unless otherwise specified herein, identical equipment shall be installed in shelters No, 1 and No, 2. 3.3.2.1 Equipment accessibility. Equipment installed within each shelter shall be capable of being removed from the shelter without major disassembly o
21、f the equipment and by the use of common hand tools. between assemblies shall be terminated by connectors or solderless terminal blocks to facilitate disconnection. Equipment not normally removed for servicing, repair, 5 adjustment, or for normal use shall be accessible from the front by such means
22、ashinged doors as in the case of the power control panel or removable accesspanels. Wiring 0 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MXL-E-28332A L14 O6 0247835 ! MLE-E-28932A(M2) *3.3.%.2 Equipment mountina flexibilitv. The method for equi
23、pment mounting (electronic and passive devices) s;hal% be in accordance with Drawing No. 8702893 and shall provide for changes in the form factor of equipment in order to aeconmodate equipment changes. Permanently installed supporting mounting structures confining electronic equipment mounting space
24、 to a given form factor or to accommodate a given piece of equipment shall be avoided in the design of the mounting facilities. suport equipment mounted within the shelter shall be capable sf being removed from their respective mounting locations without the use of special tools, shall be sirnilar t
25、o the type shown in Drawing No. 8702893. Stationary work benches shall be provided for stationary side of each shelter. The work benches shall be shock isolated and provide shock isolation for installed electronic equipment. A portable work bench and tiedown construction shall be provided similar to
26、 the type shown in Drawing No. 8702893 (see 3.3.7). The work benches shall include facilities for installing drawers, rack-mounted equipment, and rermvable slide base mounted equipment. 3.3.3.1 Flexibilitv. The work benches shall include 3.3.2.3 Test and support equipment mountinq. Test and *3.3.3 W
27、ork benches. Work benches and tiedown construction the capability of adjusting mounting area size to acconmioclate equipments having different form factors. The work benches shall include the capability of being adapted from equipment slide base mounting to equipment rack rnoiintings with6ut modifyi
28、ng any part integral to the work bench. be of lightweight construction. The drawers shall be mounted on roller-type drawer slides and shall open and elose easily while under a load of 50 pounds, shall Include pul1 handles, latches, and locking devices to irisure that the drawer will remain closed du
29、ring transit. Shock Isolation shall be provided for equipment stowed in work bench drawers . 3.3.3.2 Work bench drawers. Work bench drawers shall The drawers 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3.3.3 Tiedown facilities. Work benches s
30、hall include equipment tiedown facilities along the entire length of the work bench top without the use of holes, mounting inserts or devices installed in the working surface. Five sets of tiedown assemblies shall be provided with each work bench. One tiedown assembly shall be capable of containing
31、a piece of electronic equipment 24 inches wide by 20 inches high and weighing 100 pounds under the transport conditions specified straps. Twelve (12) additional straps shall be included in each shelter. ? herein. Each assembly shall include two bars and four 3.3.3.4 Work bench top. The work bench to
32、p shall be 1/8-inch-thick tempered masonite on 5/8-inch-thick plywood. A removable mylar sheet covering shall be provided to cover the work bench top when it is not in use. Provisions for a Pace work holding fixture, or equal, ana an illuminated optic fixture shall be provied in each shelter. *3,3,3
33、,5 FoPdincr work bench. A folding work bench of lightweight metal construction, capable of supporting 288 pounds, shall be located next to the side work bench at the front of each shelter, When unfolded, the work bench skiaPl provide a continuous working surface across the front of the shelter, shal
34、l be attached to the front wall of the shelter for transit and when unfolded shall be attached to the curbsie work bench for support. The folding work bench shall providea minimbun of 6 square feet of working surface. The folding work bench 3,3,3,6 Workincr area. The side work benches, the portable
35、work bench and the folding work benches shall provide a maximum amount of unimpeded nonconductive working surf ace . h ?3,3,4 Wall-mounted equipment racks. An equipment mounting rack of lightweight metal construction shall be provided on the curbside of each shelter similar to Drawing No. 8702893, E
36、ach wall rack shall support a distributed load of 400 pounds under the shock and vibration requirements imposed by tRe transport conditions and tests specified herein. c Each wall rack shall provide Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-inf
37、inite horizontal positioning of equipments w * 3 . 3 , 9.9.3 Ground rods , The contractor shall furnish four 6-foot-long- grounG3-.rods complete with ground cable -clamp and “Tit handle. *3.3,9.10 Color codinq. Color coding for the 6b-Hz and 400-Hz power distribution systems including the power inpu
38、t cables shall be as follows: Black Phase A (T1) Red Phase B (T2) Green White Phase C (T3) Neutral or Ground (TO) . “3.3.10 Liqhtinq. The shelters shall be equipped with fluorescent lights, incandescent lights, and blackout protection. A minimum of 80- to 100-foot candles at work bench level shall b
39、e provided. All lighting .circuits shall be 115 V nominal, 60 Hz. The lighting circuits shall be protected by circuit breaker(s) located on the power control panel each shelter shall be by means of two rows of double tube shallow fluorescent fixtures with line filters, diffusing shields, radiation s
40、hields, and removable plastic covers. Each row of lights shall be controlled by a switch. The switches shall be located on the quick-connect/disconnect, double fluorescent lighting fixtures shall be provided with the capability of being connected into either shelters lighting system by a threaded an
41、d keyed connector. *3.3.10,1 Fluorescent lishtinq, General lighting of n - - blackout interlock box. In the ESC, two rows of 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-lights shall be located under the equipment racks and be controlled by sep
42、arate switches located near the lights. The light bulbs shall be of the rough service type and . shall be vertically mounted in shock-absorbing bases. In the ESC, quick-connect/disconnect wall-mounted fixtures shall be provided with capability to inter- connect into either shelter bench lighting sys
43、tem by a threaded and keyed connector. Separate switches shall be located on wall-mounted fixtures. . ?3 . 3 . 10.3 Blackout protection. To insure positive blackout protection, all shelter openings through the wall shall be made lighttight. Electrical interlocks shall be arranged so that if the outs
44、ide doors are opsned, the lighting circuits shall be broken. The shelters shall include a blackout curtain inside the doors. A neon lamp shall be mounted over the doors to give a small amount of illumination and the circuit shall permit the neon lamp to be left on continuously. Under blackout condit
45、ions, the doors interlock switches shall be operated to the “OFF“ psition. When the lighting circuits are broken, the operation of any equlpnent in use shall not be disrupted. The blackout interlock and light switch box shall be mounted on the interior wall to the left of the doors as you enter. *3.
46、3, 11 Air conditioninq, Two air conditioners for each shelter shall be contractor furnished and shall be Airflow model PAC-2-Sl0, or equal, for a total cooling capacity of 30,000 British thermal unithour (Btu/h) , Installation shall be in accordance with Data List PZ101, except as otherwise specifie
47、d herein. All associated items necessary for the proper operation and installation o the two air conditioners shall be supplied, Both air conditioners shall be identical and completely inter- changeable. *3.3.151 Air conditioner. The two air conditioners shall be in accordance with Data List PZ101 a
48、nd each shall meet the following requirements. shall be a complete self-contained unit with convenient mounting brackets for mounting on the exterior of the fixed forward wall of each shelter. The design of the unit shall % Each air conditioner c HfL-E-28732A q7 M 777770b 02478y3 7 MIL-E-28932A (MC)
49、 *3.3.10.2 Incandescent liqhtinq. Incandescent lighting shall be furnished to illuminate the work benches. The 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-*3.3.11.1.1 Coolinq capacity. Each air conditioner shall have a cooling capacity of 15,000 ,Btu/h at sea level with an ambient temperature of 131 F. The unit shall be desig
